SOLVENT n.
uid) suitable for, or employed in, solution, or in dissolving something; as, water is the appropriate solvent of most salts, alcohol of resins, ether of fats, and mercury or acids of metal, etc.
SUBJECT n.
ipal; the ego. Cf. Object, n., 2. The philosophers of mind have, in a manner, usurped and appropriated this expression to themselves. Accordingly, in their hands, the phrases conscious or thinking subject, and subject, mean precisely the same thing. Sir W. Hamilton.